We investigate the electromechanical sensing capabilities of aligned carbon nanotube (CNT) arrays as a means for a lightweight and simple electromechanical transduction element. CNT array heights of 25 and 350 μm are examined using a modified dynamic mechanical analyzer (DMA) to impart multiple strain-based test configurations while simultaneously measuring electrical resistance. Observed gauge factors range from 12.5 for the 25μm array to greater than 190 for the 350 μm array, with a peak sensitivity of 13,750 ohms/gram force achieved for the 350 μm array. The electromechanical response observed was independent of the examined frequency range, suggesting high fidelity sensory capabilities. Results of this study serve as a preliminary proof of concept for using CNT arrays as a transduction mechanism for a proposed artificial hair sensor for small air vehicles.
- Aerospace Division
Piezoresistive Reponse of Aligned Carbon Nanotube Arrays for Flow Sensing Applications
Maschmann, MR, Ehlert, GJ, & Baur, JW. "Piezoresistive Reponse of Aligned Carbon Nanotube Arrays for Flow Sensing Applications." Proceedings of the ASME 2011 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. ASME 2011 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, Volume 2. Scottsdale, Arizona, USA. September 18–21, 2011. pp. 673-680. ASME. https://doi.org/10.1115/SMASIS2011-5096
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